How can I set up 6014 to provide voltage to an actuator?

[psandekian]

Hi,

I'm working on a project that I need to read one pressure sensor and supply a voltage to an actuator.  I want to collect data from both channels.  I have a 6014.  Can this do what I need?  Is there an example that someone can recommend?  I'm using LabVIEW 8.0 and MAX 4.0.

Thanks!

Patty

[vijayks]

Hi Patty

I would like to have some more data on your pressure sensor and the actutator... What kinda actuator is that ? A DC motor or AC motor driven ? and is it a stepper/servo motor based acutator...

And your pressure sensor has a voltage output ?

Little more specifics would help others to help you ...


vijay

[psandekian]

Hi vijay,

The pressure sensor has a voltage output of 0-10 v.  It is supplied an excitation by an external source.  The actuator is an air valve.  It is a magnetic piston driven actuator that allows air to pass through when triggered.  The pressure sensor is measuring the air allowed through.

For equipment, I have the 6014 which is connected to an SC-2345.  In that I have the following: SCC-AI01, SCC-AI02, SCC-FT01, SCC-FT01, SCC-TC02, SCC-DI01, SCC-DI01, SCC-RLY01, SCC-RLY01, SCC-PWR02.  I have several empty slots too.

I hope this helps!

Thanks!  Patty

[vijayks]

Hi Patty

The first task of measuring pressure is going to be easy. It's a standard voltage output that you will have to correlate to your pressure values.

Now abt the controls part... What kinda voltage does it have to supplied with and how long... would respond to digital pulses ? or needs an analog output... any data sheets for the actuator ?

vijay

[psandekian]

Hi Vijay,

Thanks for the reply.  My actuator is controlled by 24 vdc.  I would like to hold the applied voltage for 250 ms and then close for the same time.  I need it to cycle three times.  I've been able to collect data from my pressure sensor but the relay idea I haven't been able to do anything with.  If there was an example that NI or one on nizone would help me out tremendously.  I'm starting small but there are a lot of variables that I have to add to this project.  Can the relay card that I have do this?  And will the SC-2345 be able to supple the voltage or will I need an external source?

Thanks!

Patty

[psandekian]

I'm sorry.  I forgot to mention.  Analog output for the actuator. 

Thanks!  Patty

[Paul_C.]

Hi Patty,

The NI-6014 analog input lines will be able to read the 0V to 10V signal from the pressure sensor.  However, the maximum DC or AC voltage that can be supplied by the NI-6014 is from -10V to 10V.  Even with the SC-2345 and two SCC-AO10 modules in series, the maximum analog output is only -20 to 20V.  On page four of the manual for the SCC-AO10, there is more information on setting two SCC-AO10 in series.   To output a full 24V with the NI-6014 and SC-2345 you will need to use an external voltage source.  You could use a relay module (SCC-RLY01) and a digital line on the NI-6014 to turn the external voltage source on and off. You can find the manual for the SCC-RLY01 here.

I also noticed that you were wondering if there was a good place to find examples for doing these analog input and output tasks.  If you’re using DAQmx, I would recommend using the example finder in LabVIEW (Help » Find Examples).  A good example for continuous analog input measurements can be found here: Hardware Input and Output » DAQmx » Analog Measurement » Voltage » Cont Acq&Graph Voltage-Int Clk.vi.  A good example for analog output can be found here: Hardware Input and Output » DAQmx » Analog Generation » Voltage » Gen Voltage Update.vi.

Please let me know if you have any more questions,

Paul C.

[psandekian]

Thanks!  I will try the external voltage.  I wasn't sure about how the equipment worked so this was very helpful information!

Thanks! Patty